Yep same, ive had it once on a custom 3.1 it happened same day i updated but hasnt again since, been about 5 days now. funny thing is my mate at work is on a non jailbroke, unmodified 3.1 and his is going comatose on a regular basis, it just happen to him about 10 mins ago.

My 3G has done it 3 times since updating. Mine would go to sleep and not wake back up. I hit home and/or power and nothing. Reboot fixes it temporarily?? I thought it had something to do with the jailbreak, but when I think about it, it happened the first time before the jailbreak and I thought maybe I had turned it off. I had the "no slider response" on the 3.1 betas a few times when someone would call and I couldn't answer. It was not jailbroken then. This is a perfect reason for apple not to disallow downgrades. Also I'm having an issue accessing a work related web site over vpn. It just closes safari. I tried it on 2 3G's and 2 3GS's on 3.1 and all do the same. I downgraded to 3.0 and I can access the page just fine. Wierd...

don't you love it when a company pretends that issues you have don't exist?

I recently read that Sony finally admitted to an nVidia chipset problem that users have been complaining about for years. I recall MS denying the Xbox 360 having problems for a good year before admitting there was a problem and extending warranties.

How long for you, Apple? From "Coma Mode" to Google rejections, you're continually reminding us that you're no better than the rest...and sometimes a little worse.

I had this issue when I first applied a custom firmware and then ran a restore from backup. I figured I would try restoring again from a custom firmware but set my phone up as a new phone. Since then I have not had the "Coma Mode" issue. Just figured I'd drop in my experience.

How many are using custom firmware's when experiencing this problem?
How many are restoring from a backup?

This has happened to me at least 3 major times when trying to unlock the device and numerous minor times when exiting the email or ipod app (however, during those numerous minor times it responded after 20-30 seconds).

I have had this problem at least 5 times over the last 4 days that I have upgraded to 3.1 It's not annoying enough yet to the point where I have set aside time to restore to 3.0.. yet.. The other weird bug I have noticed is that when I go to bed with 7% battery it will die over night and yet I wake up and plug it in it turns on with something like 27% battery after 20 seconds...

Apple created these problems with all their restrictive programing elements. They took a perfect OS and added so much protective junk it will take years to figure out what/when/how. Interesting turn if events .

My wife has the 3Gs32 and about a week after she got it, she told me that a couple times at work, her phone would not unlock. The screen came on and the slider was doing the shimmer thing, but she could not slide it.

She did the reboot and everything was okay until the next time.

I need to ask her if it is still happening. She is running 3.0.1, JB the first day we got it.

i refuse to install 3.1 on my iphone after putting it on my work phone and my girlfriends phone. both lag in control once in a while and do freeze up requiring a reboot. its really annoying that this upgrade performs more like a winme or a first year vista os. guaranteed that there will be a new os tho, so if you haven't installed 3.1 yet....don't.